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Bender, Nicole; Heg, Dik; Hamilton, Ian; Bachar, Zina; Taborsky, Michael; Oliveira, Rui (2006). The relationship between social status, behaviour, growth and steroids in male helpers and breeders of a cooperatively breeding cichlid. Hormones and behavior, 50(2), pp. 173-182. San Diego, Calif.: Elsevier 10.1016/j.yhbeh.2006.02.009
Hamilton, Ian (2006). The ideal free distribution. In: Stephens, D.W.; Brown, J.; Ydenberg, R.C. (eds.) Foraging. Chicago: The University of Chicago Press
